The WebRamp 300e is an analog router that accepts 1 to three modems (www.rampnet.com
). It is programed via a web interface with a phone number username and password and it sets its ip address to be 192.168.1.1 and severs dhcp to win and Linux clients.
If I get a static ip from my isp it is obviously assigned to the router. I can (and this is what I would like to know how they do it) create a visible (there term) computer. This means that all traffic to this static ip is routed to the visible computer on a private address like 192.168.1.2. The net effect is that from the inside network the visible computers address is 192.168.1.2 and from the outside Internet the ip address of this same computer is the static address my isp defined.
But there is an exception, traffic from the outside to the static ip can be directed to the router if it is web or ftp traffic.
There is another exception, instead of a visible computer a local application (webramp term) can be created where a specific 192.168.1.x address is associated with a specific tcpip/port.
This lets me take a single valid ip address and assign different services to different physical computers behind the router.
Where do I go to start emulating this behavior? I suspect IP/chains. Also is the CNAME deal going to be part of this?